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// CODE SNIPPET

503.1.4 Occupied Roofs

Building Code 2018 of Illinois > 5 General Building Heights and Areas > 503 General Building Height and Area Limitations > 503.1 General > 503.1.4 Occupied Roofs
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ILLUSTRATION
A roof level or portion thereof shall be permitted to be used as an occupied roof provided the occupancy of the roof is an occupancy that is permitted by Table 504.4 for the story immediately below the roof. The area of the occupied roofs shall not be included in the building area as regulated by Section 506.

Exceptions:
  1. The occupancy located on an occupied roof shall not be limited to the occupancies allowed on the story immediately below the roof where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2 and occupant notification in accordance with Section 907.5 is provided in the area of the occupied roof.
  2. Assembly occupancies shall be permitted on roofs of open parking garages of Type I or Type II construction, in accordance with the exception to Section 903.2.1.6.

503.1.4.1 Enclosures Over Occupied Roof Areas

Elements or structures enclosing the occupied roof areas shall not extend more than 48 inches (1220 mm) above the surface of the occupied roof.
Exception: Penthouses constructed in accordance with Section 1510.2 and towers, domes, spires and cupolas constructed in accordance with Section 1510.5.

Related Code Sections


1607.13.3 Structural Design, Occupiable Roofs
Areas of roofs that are occupiable, such as vegetative roofs , roof gardens or for assembly or other similar purposes, and marquees are permitted ...
Building Code 2018 of Illinois > 16 Structural Design > 1607 Live Loads > 1607.13 Roof Loads > 1607.13.3 Occupiable Roofs
1607.14.2.2 Structural Design, Occupiable Roofs
Areas of roofs that are occupiable, such as vegetative roofs , landscaped roofs or for assembly or other similar purposes, and marquees ...
Building Code 2021 of Illinois > 16 Structural Design > 1607 Live Loads > 1607.14 Roof Loads > 1607.14.2 Reduction in Uniform Roof Live Loads > 1607.14.2.2 Occupiable Roofs
503.1.4 General Building Heights and Areas, Occupied Roofs
A roof level or portion thereof shall be permitted to be used as an occupied roof provided the occupancy of the roof is an occupancy ...
Building Code 2018 of Illinois > 5 General Building Heights and Areas > 503 General Building Height and Area Limitations > 503.1 General > 503.1.4 Occupied Roofs
503.1.4 General Building Heights and Areas, Occupied Roofs
A roof level or portion thereof shall be permitted to be used as an occupied roof provided the occupancy of the roof is an occupancy ...
Building Code 2021 of Illinois > 5 General Building Heights and Areas > 503 General Building Height and Area Limitations > 503.1 General > 503.1.4 Occupied Roofs
1006.3 Means of Egress, Egress From Stories or Occupied Roofs
The means of egress system serving any story or occupied roof shall be provided with the number of separate and distinct exits or access ...
Building Code 2018 of Illinois > 10 Means of Egress > 1006 Number of Exits and Exit Access Doorways > 1006.3 Egress From Stories or Occupied Roofs
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